Cloning Redhat Servers in Vmware and networking

After cloning a Redhat/Centos box in vmware and booting it, the network refused to come up.

I found that udev had the MAC's for the old server hard coded and did not clean them up on the reboot.

Commenting out the old lines and rebooting forced udev to recreate new entries and away we went.

{ krkardlnxapp2 } [ /etc/udev/rules.d ]$ cat 70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.

# PCI device 0x15ad:0x07b0 (vmxnet3) (custom name provided by external tool)
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:b5:00:c9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x15ad:0x07b0 (vmxnet3)
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:b5:08:a0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x15ad:0x07b0 (vmxnet3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:b5:08:a0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

How to add a disk to a vmware linux guest without rebooting

I have a whole series of linux guests running on some ESX hosts off NFS shares.

Today I wanted to add another disk to a running guest and couldn't reboot it.
ESX let me add the disk but the CentOS 5.3 guests didn't see it automatically.

I ran this command:
echo - - - > /sys/class/scsi_host/host0/scan

"That is echo dash space dash space dash /sys/class/scsi_host/host zero /scan"

and then the disk showed up under fdisk -l

Put a new LVM on it, added a filesystem, and mounted it.